JPS5459972A - Alternating current type surface electrometer - Google Patents
Alternating current type surface electrometerInfo
- Publication number
- JPS5459972A JPS5459972A JP12653677A JP12653677A JPS5459972A JP S5459972 A JPS5459972 A JP S5459972A JP 12653677 A JP12653677 A JP 12653677A JP 12653677 A JP12653677 A JP 12653677A JP S5459972 A JPS5459972 A JP S5459972A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- measured
- vibrating
- type surface
- aperture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
PURPOSE: To reduce the number of required electrodes of the a.c. type surface electrometer and achieve the improvement in its sensitivity by making combination use of a vibrating electrode as a detecting electrode and vibrating the vibrating electrode in the direction parallel to the surface being measured thereby producing fluctuating electric fields.
CONSTITUTION: As a tuning fork 6 is excited via tuning fork driving coil 7, an electrode 5 vibrates in the direction parallel to the body to be measured 2. This turns out that the effective opposing area of the electrode 5 and aperture 3, i.e., the dielectric flux arriving at the electrode 5 from the body to be measured 2 through an aperture 3, changes with time, as a result of which displacement current (i) flows through resistance R. Since the voltage e=iR produced in the resistance R is proportional to the surface potential V to be measured, this may be used as a quantity indicating the surface potential, if necessary, by amplifying the same with an amplifier 8
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12653677A JPS5459972A (en) | 1977-10-21 | 1977-10-21 | Alternating current type surface electrometer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12653677A JPS5459972A (en) | 1977-10-21 | 1977-10-21 | Alternating current type surface electrometer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5459972A true JPS5459972A (en) | 1979-05-15 |
Family
ID=14937620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12653677A Pending JPS5459972A (en) | 1977-10-21 | 1977-10-21 | Alternating current type surface electrometer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5459972A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5695248A (en) * | 1979-12-28 | 1981-08-01 | Canon Inc | Image forming device |
JPS57133360A (en) * | 1981-02-13 | 1982-08-18 | Nec Corp | Potential sensor |
JPS61129579A (en) * | 1984-11-29 | 1986-06-17 | Matsushita Electric Ind Co Ltd | Surface potential sensor element |
JPS61129583A (en) * | 1984-11-29 | 1986-06-17 | Matsushita Electric Ind Co Ltd | Manufacture of surface potential sensor element |
JPS61140870A (en) * | 1984-12-14 | 1986-06-27 | Matsushita Electric Ind Co Ltd | Manufacture of surface potential sensor element |
JPH06300801A (en) * | 1993-04-14 | 1994-10-28 | Nec Corp | Potential sensor |
JPH06300800A (en) * | 1993-04-14 | 1994-10-28 | Nec Corp | Potential sensor |
JPH07134152A (en) * | 1993-11-12 | 1995-05-23 | Nec Corp | Potential sensor |
-
1977
- 1977-10-21 JP JP12653677A patent/JPS5459972A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5695248A (en) * | 1979-12-28 | 1981-08-01 | Canon Inc | Image forming device |
JPS57133360A (en) * | 1981-02-13 | 1982-08-18 | Nec Corp | Potential sensor |
JPS61129579A (en) * | 1984-11-29 | 1986-06-17 | Matsushita Electric Ind Co Ltd | Surface potential sensor element |
JPS61129583A (en) * | 1984-11-29 | 1986-06-17 | Matsushita Electric Ind Co Ltd | Manufacture of surface potential sensor element |
JPS61140870A (en) * | 1984-12-14 | 1986-06-27 | Matsushita Electric Ind Co Ltd | Manufacture of surface potential sensor element |
JPH06300801A (en) * | 1993-04-14 | 1994-10-28 | Nec Corp | Potential sensor |
JPH06300800A (en) * | 1993-04-14 | 1994-10-28 | Nec Corp | Potential sensor |
JPH07134152A (en) * | 1993-11-12 | 1995-05-23 | Nec Corp | Potential sensor |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2829521B2 (en) | Current detector | |
WO2000028337A3 (en) | Electronic circuit with a non-continuous discharge path | |
JPS5772008A (en) | Position sensor | |
JPS5459972A (en) | Alternating current type surface electrometer | |
KR920704150A (en) | Self-detection device | |
JPS5748617A (en) | Level detector for finely divided particles | |
JPS5682443A (en) | Transformation rate measuring apparatus of steel material | |
US4121456A (en) | Meter for the flow rate or the speed of a gas stream | |
JPS55144557A (en) | Surface potentiometer | |
JPS55144556A (en) | Surface potentiometer | |
SU560193A1 (en) | Magnetic field measurement method | |
SU387298A1 (en) | DEVICE FOR MEASURING ELECTRIC POWER | |
SU655953A2 (en) | Capacitance-type sensor for measuring moisture-content | |
SU546024A1 (en) | Device for measuring electron beam current | |
JPS6457163A (en) | Method and apparatus for measuring impregnating depth of impregnating material | |
SU696548A1 (en) | Method of determining electrochemical resistor resistance | |
RU1775688C (en) | Electric field intensity measuring device | |
JPS5641330A (en) | Manufacture of ferromagnetic, long continuous material having uniform reluctivity | |
SU898352A1 (en) | Device for measuring magnetic fields | |
JPS56137217A (en) | Electromagnetic induction-type liquid level gage | |
GB1512235A (en) | Electronic flow gauge | |
SU119614A1 (en) | Voltage Measuring Device | |
SU629517A1 (en) | Magnetic core magnetic field induction sensor | |
SU785910A1 (en) | Hall sensor | |
JPS5476186A (en) | Voltage detector |